So would you let your 15 week old baby ride a pony with another child holding them?
I just saw a Mum post a pic and message about this, she was so pleased about her baby riding a pony. Said it was the first of many rides to come.
No way in a million years would I take my baby on a horse, they are too big, dangerous, and unpredictable imo. Also, I've never found horse riding fun. I doubt it's fun for the horse either.
I feel my judgement is clouded though by the fact that every time I see 2 relatives who own ponies, they have some new injury from riding or caring for them. 
People seem really horse obsessed here though, so maybe this is actually quite normal in England? No clue. 🤷🏻♀️